Which of the following combinations cannot produce...

Question

Which of the following combinations cannot produce a buffer solution? Select all that apply.NH3 and (NH4)2SO4 HNO2 and KNO2 HOCl and NaCl

Jules Bruno · Accepted Answer

Recall that a buffer can be composed of the following:• weak base and its conjugate acid• weak acid and its conjugate base• weak acid and a strong base ▪ concentration of weak acid > concentration of strong base• weak base and a strong acid ▪ concentration of weak base > concentration of strong acid[readmore]a. NH3 and (NH4)2SO4 • NH3 →  weak base• (NH4)2SO4 breaks up in the solution as NH4+  and SO42-  NH3       +      H2O       →       NH4+      +         OH-(weak acid)                                            (conjugate base)• weak acid + conjugate base = buffer• the solution is a good buffer systemb. HNO2 and KNO2 • HNO2  → weak acid• KNO2 breaks up in the solution as K+ and NO2-▪ Na+ is a neutral ion → will not contribute to pH      HNO2      +       H2O        →      NO2-      +        H3O+(weak acid)                                 (conjugate base)• weak acid + conjugate base = buffer• the solution is a good buffer systemc. HOCl and NaCl • HOCl→ weak acid• NaCl breaks up in the solution as Na+ and Cl-      HOCl      +       H2O        →      OCl-      +        H3O+(weak acid)                                 (conjugate base)• Cl- and HOCl is not a conjugate pair• not a good buffer system

Problem: Which of the following combinations cannot produce a buffer solution? Select all that apply.NH3 and (NH4)2SO4 HNO2 and KNO2 HOCl and NaCl

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Problem: Which of the following combinations cannot produce a buffer solution? Select all that apply.NH3 and (NH4)2SO4 HNO2 and KNO2 HOCl and NaCl

FREE Expert Solution

Problem Details

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